An Irish granny made a hilarious discovery about her Christmas tree decorations.

Uh oh Gran! Can you guess what is inside this Christmas tree ornaments?

Cork woman shocked to discover her granny had hung up underwear among her Christmas ornaments...They are pretty though.

One Irish grandmother had an early Christmas surprise this week when she discovered that she had decorated her Christmas tree with ornaments that contained sparkly purple thongs.

Alex Bermingham from Cork, Ireland, had called into her granny's house to give her a hand in putting up the Christmas decorations. Some of the baubles she was hanging up on the tree made her do a double-take, however, when it appeared they were not exactly what her grandmother thought she had purchased.

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An Irish granny made a hilarious discovery about her Christmas tree ornaments. Image: Alex Bermingham/Twitter

The clear decorations were filled with a sparkly purple material that her granny had thought would be a nice addition to the Christmas tree but on investigating further, Bermingham found that the baubles opened up to reveal g-strings.

My 74 year old grandmother bought Christmas baubles in Dunnes Stores, which I have just realised upon decorating her tree that unbeknownst to her upon purchase, they are in fact, lavender glitter G-strings.